Memory Allocation with Excessive Size Value in GitLab_CVE-2025-12983

3.5 / 10

LOW

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.

Basic Information

ID CVE-2025-12983

Source GitLab

Published Nov 15, 2025 at 08:13

Affected Product

Vendor GitLab

Product GitLab

Version 16.9

Affected Versions GitLab GitLab 16.9
GitLab GitLab 18.4
GitLab GitLab 18.5

CWE Classification

CWE-789

References

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    "lastseen": "",
    "description": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.",
    "published": "2025-11-15T08:13:32.098Z",
    "modified": "2025-11-15T08:13:32.098Z",
    "type": "cve",
    "title": "Memory Allocation with Excessive Size Value in GitLab",
    "source": "GitLab",
    "references": "https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/\nhttps://gitlab.com/gitlab-org/gitlab/-/issues/296257\nhttps://hackerone.com/reports/3419588",
    "id": "CVE-2025-12983",
    "bulletinFamily": "",
    "cwe": [
        "CWE-789"
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    "cvelist": null,
    "sourceData": "GitLab GitLab 16.9\nGitLab GitLab 18.4\nGitLab GitLab 18.5",
    "sourceHref": "",
    "cvss": {
        "score": 3.5,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "GitLab",
    "version": "16.9",
    "vendor": "GitLab",
    "ai_description": "",
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    "ai_score": 0
}